Using the general notion of cross section fluctuations in hadron-nucleus scattering at high energies, we derive an expression for the cross section of incoherent J/ψ photoproduction on heavy nuclei dσγA→J/ψY/dt, which includes both elastic dσγp→J/ψp/dt and proton-dissociation dσγp→J/ψY/dt photoproduction on target nucleons. We find that, with good accuracy, dσγA→J/ψY/dt can be expressed as a product of the sum of the dσγp→J/ψp/dt and dσγp→J/ψY/dt cross sections, which have been measured at HERA, and the common nuclear shadowing factor, which is calculated using the leading twist nuclear shadowing model. Our prediction for the cross section of incoherent J/ψ photoproduction in Pb-Pb ultraperipheral collisions at sNN=2.76TeV and y=0,dσAA→J/ψAY(y=0)/dy=0.59-1.24mb agrees within significant theoretical uncertainties with the data of the ALICE Collaboration.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics